track method

Future<void> track({ int? versionHistoryMaxLength, int? buildHistoryMaxLength, })

Start tracking versions and builds

Implementation

Future<void> track(
    {int? versionHistoryMaxLength, int? buildHistoryMaxLength}) async {
  SharedPreferences sharedPreferences = await SharedPreferences.getInstance();
  PackageInfo packageInfo = await PackageInfo.fromPlatform();

  Map<String, List<String?>> historyTrail = Map<String, List<String?>>();

  _isFirstLaunchEver = !sharedPreferences.containsKey(_versionsKey) ||
      !sharedPreferences.containsKey(_buildsKey);
  if (_isFirstLaunchEver!) {
    historyTrail.addAll({_versionsKey: [], _buildsKey: []});
  } else {
    historyTrail.addAll({
      _versionsKey: _readHistory(sharedPreferences, _versionsKey).toList(),
      _buildsKey: _readHistory(sharedPreferences, _buildsKey).toList()
    });
  }

  // Handle versions
  _currentVersion = packageInfo.version;

  _isFirstLaunchForCurrentVersion =
      !historyTrail[_versionsKey]!.contains(_currentVersion);
  if (_isFirstLaunchForCurrentVersion!)
    historyTrail[_versionsKey]!.add(_currentVersion);

  if (versionHistoryMaxLength != null && versionHistoryMaxLength > 0) {
    var versionsToRemove =
        historyTrail[_versionsKey]!.length - versionHistoryMaxLength;
    if (versionsToRemove > 0)
      historyTrail[_versionsKey]!.removeRange(1, versionsToRemove + 1);
  }

  _previousVersion = _getPrevious(historyTrail, _versionsKey);
  _firstInstalledVersion = historyTrail[_versionsKey]!.first;
  _versionHistory = historyTrail[_versionsKey]!.toList();

  // Handle builds
  _currentBuild = packageInfo.buildNumber;

  _isFirstLaunchForCurrentBuild =
      !historyTrail[_buildsKey]!.contains(_currentBuild);
  if (_isFirstLaunchForCurrentBuild!)
    historyTrail[_buildsKey]!.add(_currentBuild);

  if (buildHistoryMaxLength != null && buildHistoryMaxLength > 0) {
    var buildsToRemove =
        historyTrail[_buildsKey]!.length - buildHistoryMaxLength;
    if (buildsToRemove > 0)
      historyTrail[_buildsKey]!.removeRange(1, buildsToRemove + 1);
  }

  if (_isFirstLaunchForCurrentVersion! || _isFirstLaunchForCurrentBuild!) {
    _writeHistory(
        sharedPreferences, _versionsKey, historyTrail[_versionsKey]!);
    _writeHistory(sharedPreferences, _buildsKey, historyTrail[_buildsKey]!);
  }

  _previousBuild = _getPrevious(historyTrail, _buildsKey);
  _firstInstalledBuild = historyTrail[_buildsKey]!.first;
  _buildHistory = historyTrail[_buildsKey]!.toList();
}